Lathe-tool



. NITE *rnrns HARRY VVIIITMORE WHITE, OF FRANKLIN, PENNSYLVANIA.

LATH E TOOL.

SPECIFICATION forming part of Letters Patent NO. 580,440, dated April13, 1897. Application filed May 8, 1896. serial No. 590,697. (No model.)

To all whom it may concern.-

Be it known that I, HARRY WHITMORE \VHITE, a citizen of the UnitedStates, residing at Franklin, in the county of Venango and State ofPennsylvania, have invented certain new and useful Improvements inLathe- Tools; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements inlathe-tool holders; and it has for its object, among others, to providea simple and cheap, yet efficient and durable, holder by which the toolmay be held in any desired position and easily removed when desired.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claim.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which Figure 1 is a side elevation of my improvement. Fig. 2 is a View of the lever. Fig. 3 is a section through Fig. 1.

Like letters of reference indicate like parts in the different views.

Referring now to the details of the drawings by letter, A designates thetool-holder to be used in the tool-post of an iron turninglathe of knownconstruction, being made of wrought-iron, malleable iron, or steel, asmay be preferred. It is formed with the slot B, extending from its outerend inward at an angle, and it mayor may not extend through to the sideof the holder. From the point I) it tapers toward the entrance, asshown.

C is a projection formed on the holder in proximity to the entrance tothe slot, and this serves as a fulcrum for the lever employed fordrawing out the tool when desired.

D is the tool. It is of high steel, made practically square and groundat d (its cut ting edge) to the required shape. On the top side it isserrated or toothed, as shown, extending transversely thereof.

E is a, wedge for holding the tool in position and dispensing with thenecessity of the employment of set-screws. It is formed upon its underface with teeth extending across the same and corresponding to the teethof the upper face of the tool, as shown. The wedge is formed with ashoulder F to receive the end of the lever by which it is withdrawn.This lever G is of peculiar shape, as shown, being curved and having itsend square, as seen at g.

In operation the tool is placed in the slot to the desired depth, andthen the wedge is driven in upon the top thereof and the engaging teethhold the tool firmly against its being withdrawn. The tool can beadjusted to any depth, and when it is desired to re move it the end ofthe lever is engaged with the shoulder of the wedge, as indicated inFig. 1, resting on the projection on the holder, and then by pressure onthe other end of the lever the wedge and tool can be easily with drawn.

The advantages of such a construction will be readily appreciated by allthose who have occasion to use such devices and who have had difficultywith the set-screws working loose and allowing the tool to become looseand to drop out.

hat is claimed as new is- The combination with the holder having theslot, and a raised portion near the entrance thereto, of the tool havingtoothed up per face and the wedge having toothed under face, and formedat its outer end with a projecting shoulder, as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

HARRY WHITMORE IVHITE.

Witnesses:

CHARLES C. RAMSDALE, CLAUDE E. CAMPBELL.

